Function install_packages

build.rs:30–43

Installs required packages and selects toolchain to use. It will prioritize `yarn` over `npm`. # Panic Will panic if none of the toolchains is installed.

()

/// # Panic
/// Will panic if none of the toolchains is installed.
fn install_packages() -> &'static str {
    let yarn = if_windows("yarn.cmd", "yarn");
    let npm = if_windows("npm.cmd", "npm");
    let npx = if_windows("npx.cmd", "npx");

    if std::process::Command::new(yarn).arg("install").spawn().is_ok() {
        return yarn
    }
    
    match std::process::Command::new(npm).arg("install").spawn() {
        Ok(_) => npx,
        Err(e) => panic!("ERROR: Npm or Yarn installation is needed.\n{e}"),
    }
}

const fn if_windows(windows: &'static str, unix: &'static str) -> &'static str {
    #[cfg(windows)]